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Nashoba Brook Pencil Factory Site
The Nashoba Brook Pencil Factory Site contains the ruins of a 19th-century dam-powered pencil factory. This factory was one of several in Acton and Concord, Massachusetts at the time that brought important developments to pencil manufacturing. All that remain today of the factory are the ruins of its dam and a few mechanical components. The site is in the Nashoba Brook Conservation Area in Acton, Massachusetts, along Nashoba Brook and the old Davis Road Dam. Visitors can access the site by following a marked path from the Davis Road parking area for the Nashoba Brook Conservation Area
== 19th century Concord-based pencil industry ==
The American pencil industry started in Concord in the 19th century. In 1812, William Munroe, a Concord-based cabinet maker, became the first American to successfully manufacture and sell wood-encased pencils. Munroe's main competitor later became the Thoreau family pencil business in Concord, run by John Thoreau, father of Henry David Thoreau. John Thoreau's brother-in-law, Charles Dunbar, discovered a deposit of graphite in Bristol, New Hampshire, in 1821. In 1823, Dunbar asked John Thoreau to join him in manufacturing pencils from this graphite. Later, Dunbar left the firm, and it acquired the name ''John Thoreau & Company''. Henry David Thoreau worked at his family's factory for most of his adult life.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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